Light and Color1 - Light and Color 07/10/2008 12:50:00...

Light and Color 07/10/2008 12:50:00 ← REVIEW FROM 08.28.08 ← We can see different objects around us because • Some of them can reflect or scatter light that enters our eyes • Some of them can emit light that enters our eyes ← The following waves propagate in free space • Light ← What does Alex see when the wave at left with wavelength 650 nm goes by what does he see? • Nothing ← How do we see each other in the classroom? • Some of the ambient light reflects from our colleagues and enters our eyes ← We see color when waves of different wavelengths enter our eyes. We can see different wavelengths than others. • Light with wavelength 650 nm appears red when it enters a viewers eye • Light with wavelength of 520 nm appears green when it enters a viewers eye • Light with wavelength of 470 nm appears blue when it enters a viewers eye. ← What is white light? A combination of all different colors.

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